Meniscus Lenses, D=25.00mm, F=75.00mm, Uncoated CVD Laser Grade ZnSe(ZnSe), United Optical Technology Co., Ltd (CAT#: STEM-OP-1953-YJL)

Meniscus Lenses, D=25.00mm, F=75.00mm, Uncoated CVD Laser Grade ZnSe(ZnSe), model 150007, is manufactured by United Optical Technology Co., Ltd.
Zinc Selenide (ZnSe) Meniscus Lenses are meniscus lenses based on zinc selenide.
A meniscus lens has an outer convex mirror surface and an inner concave mirror surface. If the convex curvature is greater than the concave curvature, the lens has positive focal length. When combined with another lens, a positive meniscus lens can shorten the focal length, thereby increasing the numerical aperture (NA) of the system without introducing significant spherical aberration. If the curvature on the concave side is large and the curvature on the convex side is small, it is a negative meniscus lens.
Note: Special attention should be paid to the fact that zinc selenide is a toxic material. Please be sure to wear gloves when using it and wash your hands after use.

Diameter: 25.00mm
EFL: 75.00mm
Coating: Uncoated
Material: CVD Laser grade(ZnSe)
BFL: 73.20mm
Curvature Radius R1: 67.70mm
Curvature Radius R2: 183.00mm
Center Thickness CT: 3.30mm
Edge Thickness ET: 2.50mm
Available Mount Ring: N/A
Design Wavelength: 10.6um
Diameter Tolerance: +0.0/-0.1mm
Center Thickness Tolerance: ±0.2mm
Focal Length Tolerance: ±1%
Centering Tolerance: ＜3 arcmin
Surface Quality: 40/20-60/40
Bevel: 0.2mmX45°

Zinc selenide is a commonly used optical glass material in the infrared band, with a transmission band of 600nm-16μm. It has the characteristics of low absorption and thermal shock resistance. It is often used in thermal imaging systems and can also be used in some visible light optical systems. It can be used as a substrate for a variety of optical components, such as lenses, windows, etc.

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